R-12P Pilot Relay Valve Truck Trailer Air Brake Bendix 065476 65476

Description

R-12P Pilot Relay Valve Truck Trailer Air Brake Bendix 065476 65476
DESCRIPTION
The R-12P™ pilot relay valve is designed to speed up
control signal application and release on long non-towing
trailers, towing trailers, dollies, and long wheelbase tractors.
It does this without adversely affecting the control signal.
The R-12P™ valve replaces the current R-8P™ valve.
Unlike a standard relay valve used as a “booster,” which
typically has a 2-4 psi differential between control and
delivery, the R-12P™ valve has zero differential. It “speeds”
up control line signal application and release in a train
of vehicles, and it delivers the same air pressure that it
receives. This provides a uniform brake signal to all trailer
and dolly brakes, even during light applications.
The unique R-12P™ valve feature is that it uses a supply
air pressure load to quicken the valve’s response time. By
balancing the pressure signal to all trailer and dolly brakes,
the R-12P™ valve aids in achieving overall vehicle brake
pressure balance, timing balance, and stability.
It also substantially improves brake lining wear balance
on combination vehicles by making even the most distant
brake contribute its share of braking effort.
The R-12P™ valve uses the R-12™ valve family lower body
and standard Bendix mounting brackets. It can also be
reservoir-mounted.
The body and cover are die-cast aluminum, and the valve’s
weight is approximately 2.3 lbs. Porting is as follows:
Qty.  Size
Supply (SUP)     2    1/2”
Delivery (DEL)   4    3/8”
Control (CON)   1    1/4”
Exhaust (EXH)  1     --
Technical Attributes
Mounting
.96 IN x .40 IN Slot (4x)
Mounting Bracket Location
Loose in Box
Body Configuration
2 SUP / 4 DEL (2H + 2V)
Supply Port 1
1/2-14 NPT
Supply Port 2
1/2-14 NPT
Internal Supply Passage to Cover
Yes
Control / Secondary Service Port        1/4-18 NPT
Contol Port Orientation (CW from Front Face)
90°
Delivery Port 1
3/8-18 NPT
Delivery Port 2
3/8-18 NPT
Delivery Port 3
3/8-18 NPT
Delivery Port 4
3/8-18 NPT
Exhaust Port
Dust Shield
Crack Pressure
0.0 PSI
TMC Washer
RD000
Maximum Operating Temperature
200 °F (93 °C)
Minimum Operating Temperature
-40 °F (-40 °C)
Cross Reference
AUTOMANN   CSB2102
BENDIX          109264, 109446, OR109264, 03-208
HEIL                99410268
LELAND          LI199, L-1199
NAPA              TRAT10453
OTR                OTR065476
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